Ring size cutter

ABSTRACT

A ring size cutter whereby a ring is positively and accurately cut through cam controlled blade action, and where cutting blades of different thicknesses are readily substituted.

United States Patent [191 3/1929 Bollaert 83/628 X Lamey 5] Jan. 22, 1974 [54] RING SIZE CUTTER 3,160,044 12/1964 Somervillei 83/54 X [76] Inventor: Melvin A. Lamey, 223 N. Main St., 1 Oakland City, 1nd. Primary Examiner.-Andrew R. Juhasz Assistant Examiner-Leon Gilden [22] Flled' May 1971 Attorney, Agent, or Firm-Warren D. Fiackbert [21] App]. No.: 142,442

52 us. Cl. 83/628, 83/658 [571 ABSTRACT [51] Int. Cl 826d 5/16 r A rmg stze cutter whereby a rmg 1s positively and ac- [58] Field of Search 83/628, 54, 581, 658 curately cut through cam controlled blade action, and

where cutting blades of different thicknesses are read- [56] References Cited ily substituted UNITED STATES PATENTS 4 Claims, 5 Drawing Figures PAIENTEmmzm -3.788.71'1

l6 INVENTOR ATTORN Y mzmmmzzm v 3786711 sumanrz INVENTOR Mn WM 19. 1.4545) ATTORNEY 1, RING SIZE CUTTER As is known, it is oftentimes necessary to cut a ring to achieve a custom fit, such cutting being either to enlarge or reduce the ring size. The preceding has been accomplished heretofore by a sawing action which was time consuming, which was oftentimes a guess, and which mostly resulted in material loss. The invention has overcome the aforesaid objections in providing a device which, through the use of cutting blades of various thicknesses, permits rapid cutting to the desired tolerence.

Briefly, the invention involves a two-part framework, where one part is adjustable with respect to the other part to accomodate cutting blades of various thicknesses. The aforesaid cutting blade is mounted on a hand controlled cam, and the ring under process is readily positioned on a projecting portion on the framework for the sizing operation. In other words, movement of the cam, and, hence, the cutting blade, effects engagement with the ring and the proper cut. The cut portion can be saved and reused, for example, in a situation where a ring is being enlarged. The invention eliminates any chance cutting, representing a considerable time saving for the user.

A better understanding of the present invention will become more apparent from the following description, taken in conjunction with the accompanying drawings, wherein FIG. 1 is a perspective exploded view of the ring size cutter defining the invention;

FIG. 2 is a view in side elevation of the invention, looking from left to right in FIG. 1

FIG. 3 is a view in front elevation of the invention, looking from right to left in FIG. 2;

FIG. 4 is a fragmentary detailed view showing the cutting blade at a position prior to cutting; and,

FIG. 5 is another fragmentary detailed view, comparable to that of FIG. 4, but showing the cutting blade in a cutting position.

For the purposes of promoting an understanding of the principles of the invention, reference will now-be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. Itwill nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention is illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.

Referring now to FIGS. 1, 2 and 3, the ring size cutter of the invention is defined by framework 12 having a base 12a, an upstanding body portion 12b, and a cooperating body portion 12c. As particularly evident in FIG. 1, projections 12d extend from body portion 12b and are received in openings 12d in the cooperating. body portion 12c.

In order to maintain body portion 12b and cooperating body portion 12c in any desired spaced-apart position, locking means, such as a set screw 14, extend through one of the openings 12d of cooperating body portion 12c, selectively engaging a projection 12d. The spacing between body portion 12b and cooperating body portion 12c is dependent upon the thickness of a cutting blade 16 employed for a particular sizing operanon.

Body portion 12b and cooperating body portion 12c further include projections 12b and 12c, such being curved so that, when properly spaced, a ring 30 can be slipped thereover (see FIG. 2).

The body portion 12b has an upstanding arm l2e which positions a rotatable disc 17 by means of threaded member l9.-The disc 17 has an arm and knob assembly 20 secured thereto for manually rotating the disc 17. As particularly evident in FIGS. 1, 2, 4 and 5, a pin 22 extends from a side surface of the disc 17, being off-center, and received in an opening 160 in the cutting blade 16. A stop 24 also extends from the body portion 12b and is received in an opening 12f in the cooperating body portion l2c.

In use, a variety of cutting blades of different thicknesses are available, where the desired cutting blade 16 is placed on the pin 22 on the disc 17. The cooperating body portion 120 is tightened at a position dependent upon the thickness of the cutting blade 16, i.e., which allows movement of the cutting blade 16. At this time, the cutting blade 16 may be resting against the stop 24 and, for example, assumes the position of FIG. 4. When the arm and knob assembly 20 is rotated to the position of FIG. 5, the cutting blade 16 moves downwardly, en-

gaging and cutting a ring 30 which has been placed on the spaced-apart projections 12b and 12c of the body portion 12b and the cooperating body portion 12c, respectively. The removed material may then be saved for reuse, as in connection with a ring enlargement operation.

From the preceding, it should be apparent that a desired amount of material can be simply and accurately removed from a ring to achieve the proper size. The invention represents important savings to the user, i.e., in the matter of time as well as the material saved with its accurateoperation. The description herein has not involved any reference to the further steps of a ring sizing procedure, as these are known in the trade and are not a part of the cutting operation achieved by the invention.

The preceding ring size cutter may be modified within the spirit of the invention. In this connection, and by way of example, other means may be employed to secure together the body portion and the cooperating body portion of the framework, as well as the means for mounting the cutting blade. Thus, the above description should be considered illustrative, and not as limiting the scope of the following claims:

I claim:

1. A ring size cutter comprising a framework having a first fixed portion and a second portion laterally movable with respect to said first fixed portion through a range of positions, locking means maintaining said first fixed portion and said second portion of said framework at a preselected spaced-apart position, split projecting means adapted to receive a ring, a first part thereof fast to the fixed portion of said framework and a second part thereof movable with the other portion of said framework, a cutting member, and rotatable means on one of said portions of said framework mounting said cutting member.

2. The ring size cutter of claim 1 where an off-center projection on said rotatable cutting member mounting tion of said framework is dependent upon the thickness of said cutting member. 

1. A ring size cutter comprising a framework having a first fixed portion and a second portion laterally movable with respect to said first fixed portion through a range of positions, locking means maintaining said first fixed portion and said second portion of said framework at a preselected spaced-apart position, split projecting means adapted to receive a ring, a first part thereof fast to the fixed portion of said framework and a second part thereof movable with the other portion of said framework, a cutting member, and rotatable means on one of said portions of said framework mounting said cutting member.
 2. The ring size cutter of claim 1 where an off-center projection on said rotatable cutting member mounting means holds said cutting member.
 3. The ring size cutter of claim 1 where one of said portions of said framework includes stop means selectively engaged by said cutting member.
 4. The ring size cutter of claim 1 where the lateral distance between said first portion and said second portion of said framework is dependent upon the thickness of said cutting member. 